Okla. Stat. tit. 51, § 51-36.1: Persons required to take oath or affirmation

Every officer and employee of the State of Oklahoma, or of a

county, school district, municipality, public agency, public

authority, or public district thereof, who, on or after July 1,

1953, is appointed or elected to office, or who after said date is

employed, for a continuous period of thirty (30) days or more, in

order to qualify and enter upon the duties of his office or

employment and/or receive compensation, if any, therefor, shall

first take and subscribe to the loyalty oath or affirmation required

by this act and file the same as hereinafter set forth. Provided,

that a public employee who is employed or whose employment is

extended on a fiscal year basis and who has duly taken and filed the

oath required by this act in order to qualify for and enter upon, or

continue in, the duties of his employment, need not again take and

file such an oath so long as his said employment, or reemployment is

continuous or consecutive.